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Subject[PATCH] Add switch for dock events
Add a switch to signal dock events to userspace.

Signed-off-by: Matthew Garrett <>


I've done this as an input event rather than anything else since there
isn't necessarily a terribly coherent concept of a dock device. HPs (for
example) don't use ACPI for docking - the dock is simply an extension of
devices that are already on the system. We can't sensibly create a dock
platform device and then generate uevents on it. Doing it this way lets
us standardise on a way to send docking events to userspace, which lets
desktops do things like automatically expand onto external monitors when
the system is docked.

diff --git a/include/linux/input.h b/include/linux/input.h
index 28a094f..0bc55ee 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -638,6 +638,7 @@ struct input_absinfo {
#define SW_TABLET_MODE 0x01 /* set = tablet mode */
#define SW_HEADPHONE_INSERT 0x02 /* set = inserted */
#define SW_RADIO 0x03 /* set = radio enabled */
+#define SW_DOCK 0x04 /* set = plugged into dock */
#define SW_MAX 0x0f
#define SW_CNT (SW_MAX+1)

Matthew Garrett |

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